London - Former British tennis star Tim Henman believes Andy Murray should only compete at the upcoming US Open if he is fully fit.
The Scot has been struggling with a hip injury for most of the year, translating to some poor results in the Grand Slams by his high standards.
Since claiming the 2016 Wimbledon crown, Murray has reached the final four just once in the four following majors and is set to lose his world No 1 ranking before the US Open begins.
"The standard is so good you can't compete unless you're 100% healthy so it will be interesting to see what his schedule is in the summer and in the lead up to the US Open, but hopefully he can regain that fitness and start challenging for the biggest titles again," Henman told Sky Sports.
"At the end of the day the most important thing is your health and, as I said, you can't compete at the top of the game unless you're 100% healthy or extremely close to it.
"Murray's had problems with his hip. I know that he's having a lot of tests at the moment and scans and seeing specialists to try and get to the bottom of that. And hopefully he can be back competing soon."
The 137th edition of the US Open begins on August 28 at Flushing Meadows, with Swiss star Stan Wawrinka as the defending champion.